INCOME TAXES (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
Apr. 30, 2013	Oct. 31, 2014	Oct. 31, 2013
Deferred Tax Assets
Other postretirement benefit liabilities		$ 1,968	$ 1,777
Accrual for sales allowances		654	602
Tax loss and tax credit carryforwards		514	371
Accrual for employee benefits		229de_DeferredTaxAssetsEmployeeBenefits	234de_DeferredTaxAssetsEmployeeBenefits
Pension liability - net		160
Share-based compensation		145	142
Inventory		22us-gaap_DeferredTaxAssetsInventory	161us-gaap_DeferredTaxAssetsInventory
Allowance for credit losses		73	69
Deferred gains on distributed foreign earnings		32	26
Deferred compensation		47	44
Other items, assets		586us-gaap_DeferredTaxAssetsOther	419us-gaap_DeferredTaxAssetsOther
Less valuation allowances		(637)	(254)
Deferred income tax, assets		3,793us-gaap_DeferredTaxAssetsNet	3,591us-gaap_DeferredTaxAssetsNet
Deferred Tax Liabilities
Tax over book depreciation		542	582
Lease transactions		404	424
Pension asset - net			137
Goodwill and other intangible assets		89	100
Undistributed foreign earnings		26	26
Other items, liabilities		116us-gaap_DeferredTaxLiabilitiesOther	157us-gaap_DeferredTaxLiabilitiesOther
Deferred income tax, liabilities		1,177us-gaap_DeferredIncomeTaxLiabilities	1,426us-gaap_DeferredIncomeTaxLiabilities
Additional Deferred Income Tax Information
Capital losses		101
Tax loss and tax credit carryforwards, expiring from 2015 through 2034		207
Tax loss and tax credit carryforwards with an indefinite carryforward period		307
Write-off of net deferred tax assets related to German operations restructure	$ 56us-gaap_DeferredOtherTaxExpenseBenefit

The deferred tax asset related to gains on distributed foreign earnings.

No definition available.

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The sum of the tax effects as of the balance sheet date of the amount of the estimated future tax deductions arising from employee compensation and benefits costs, other than postretirement benefits, pensions, share-based compensation, and deferred compensation costs, which can only be deducted for tax purposes when the actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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Includes, 1) the sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset and 2) the tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards.

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This element represents tax loss and tax credit carryforwards with an indefinite carryforward period. Tax loss carryforwards represent the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year and tax credit carryforwards represent the tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused current tax credit carryforwards.

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This element represents tax loss and tax credit carryforwards with defined expiration dates. Tax loss carryforwards represent the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year and tax credit carryforwards represent the tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused current tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax liability attributable to deductible temporary differences from pension benefits.

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from pension benefits.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated returns and sales allowances.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets including goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity.

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